I’ve heard all sorts of arguments about what constitutes a “proper” hotpot but do you know what? I don’t care! I can’t remember where I first read about adding black pudding to it but I can tell you it makes a big difference to the flavour and the consistency of the gravy. It’s a bit like adding anchovies, ie it melts away so that you can’t recognise what it is but it has a big impact. So, just use your usual lamb and onions but add in a couple of slices of black pudding before putting your potato topping on and see what you think of the results.